JPH077983A - Rewinding roll speed controller - Google Patents

Abstract

(57) [Summary] [Purpose] Automatically stabilize the speed control of the unwinding material. [Structure] The speed setter 1 outputs the set material speed to the adder 11 and the subtractor 9, and the speed calculator 3 detects the rotation speed of the electric motor 6 from the output pulse of the oscillator 2 accompanying the rotation of the electric motor 6. Output to the control unit 5 and the converter 8. The converter 8 derives the detected material speed from the detected rotation speed and outputs it to the subtractor 9. The subtractor 9 derives a deviation value between the set material speed and the detected material speed and outputs it to the correction calculator 10. Correction calculator 1
0 outputs the speed deviation value to the adder 11 as the target value.
The adder 11 adds the target value to the set material speed to correct the set material speed, outputs the corrected set material speed to the converter 4, and the converter 4 derives the reference rotation speed from the corrected set material speed. Output to the speed control unit 5. The speed control unit 5 performs feedback control so that the actual rotation speed of the electric motor 6 becomes the reference rotation speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for controlling the speed of a drive motor for rewinding a roll of material.

[0002]

2. Description of the Related Art FIG. 4 shows a conventional rewinding roll speed control device. In FIG. 4, 1 is a material speed setting device, 2 is a pulse transmitter, 3 is a rotation speed calculator, and 4 is a rotation speed. A converter, 5 is a rotation speed control device, 6 is a reel drive motor, and 7 is a roll in which the material to be rewound is wound.

Next, the operation of the conventional rewinding roll speed control device will be described. When the operator operates the material speed setting device 1 to set the desired strip passing speed as the rewinding speed of the rewinding roll 7 in the material speed setting device 1, the converter 4 is set in the material speed setting device 1. The reference rotation speed for controlling the speed of the reel drive motor 6 is derived from the set value and output to the rotation speed control unit 5. When the operator issues a drive command for the reel drive motor 6, the pulse oscillator 2 outputs a pulse signal according to the rotation speed of the reel drive motor 6, and the rotation speed calculator 3 outputs the pulse oscillator 2. The actual rotation speed of the reel drive motor 6 is derived and output to the rotation speed control unit 5 while receiving the generated pulse signal and sampling at regular intervals. The rotation speed control unit 5 outputs electric power to the reel drive motor 6 such that the difference between the actual rotation speed received from the rotation speed calculator 3 and the reference rotation speed received from the converter 4 becomes zero. That is, the rotation speed control unit 5 performs feedback control so that the actual rotation speed of the reel drive motor 6 becomes the reference rotation speed.

[0004]

The conventional rewinding roll speed control device is constructed as described above, and the outer diameter of the rewinding roll 7 at the beginning of rewinding is the maximum diameter, and the threading is started as the rewinding work. Since the initial plate passing speed is a ratio of about 1: 200 to the maximum plate passing speed, the reel drive motor 6 becomes unstable in terms of speed control accuracy at the time of the slow-up at the beginning of rotation of the reel drive motor 6. In order to obtain unevenness in the rotation speed of No. 6 and to obtain a stable material passing speed, it was necessary for the operator to finely adjust the reference rotation speed by operating the material speed setting device 1.

The present invention has been made to solve the above problems, and enables a rewinding roll to stably control the material speed of the rewinding roll without an operator performing a fine speed adjustment operation. The purpose is to obtain a speed control device.

[0006]

[Means for Solving the Problem] A first aspect described in claim 1.
The rewinding roll speed control device according to the invention of claim 1 is provided with a rotation speed control device for performing feedback control of a reel drive motor, and a converter for converting the detected rotation speed into a detected material speed and an output from this converter. A subtractor for deriving the difference between the detected material speed and the set material speed, a material speed correction calculator for deriving a correction value for the set material speed according to the output from the subtractor, and this material speed correction calculation Adder that adds the correction value output from the device to the set material speed, and derives a corrected set material speed that is the basis of the reference rotation speed of the reel drive motor according to the output from the adder And a converter for outputting to the control unit.

In the rewinding roll speed control device according to the second invention described in claim 2, in the first invention, the detected material speed and the rewinding work start command are received, and the rewinding work start command is A start correction arithmetic unit is added to output a bias signal for increasing the value of the set material speed to the adder during the period from the input to the rotation of the reel drive motor reaching a predetermined speed.

A rewinding roll speed control device according to a third aspect of the present invention is the rewinding roll speed control device according to the first aspect of the invention, wherein the sampling time of the detected rotation speed of the reel drive motor is set based on the rewinding mode. It has a setting device.

[0009]

The rewinding roll speed control device according to the first aspect of the present invention automatically corrects the reference rotation speed of the reel drive motor in real time using the speed deviation value between the set material speed value and the detected material speed value. .

The rewinding roll speed control device according to the second aspect of the present invention uses the correction for increasing the value of the set material speed from the start of the rewinding work until the rotation of the reel drive motor reaches a predetermined speed. Automatically accelerates the rewinding roll with large inertia in real time.

The rewinding roll speed control device according to the third aspect of the invention automatically sets the sampling time suitable for the actual rewinding speed in real time.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Each embodiment of the present invention will be described in detail below with reference to FIGS.

Embodiment 1. (Corresponding to Claim 1) FIG. 1 is a configuration diagram showing a rewinding roll speed control device according to a first embodiment of the present invention. In the figure, 1 is a material speed setting device, 2 is a pulse transmitter, 3 is a rotation speed calculator,
Reference numeral 4 is a converter for deriving a reference rotation speed, 5 is a rotation speed control unit, 6 is a reel drive motor, 7 is a roll in which a material to be rewound is wound, 8 is a converter, 9 is a subtractor, 10 is a material speed. A correction calculator, 11 is an adder.

The operation of the rewinding roll speed control device of the first embodiment will be described. When the operator operates the material speed setting device 1 to set the desired strip passing speed as the material speed of the rewinding roll 7 in the material speed setting device 1, the material speed setting device 1 adds the set material speed. It outputs to the device 11 and the subtractor 9. When the operator drives the reel drive motor 6, the pulse oscillator 2 outputs a pulse signal according to the rotation speed of the reel drive motor 6, and the rotation speed calculator 3 is output from the pulse oscillator 2. While receiving the pulse signal and sampling at fixed time intervals, the detected rotation speed of the reel drive motor 6 is derived and output to the rotation speed control unit 5 and the converter 8. The converter 8 derives the detected material speed from the detected rotation speed output from the rotation speed calculator 3.
In order to derive the detected material speed from the detected rotation speed, for example, assume that the pulse oscillator 2 outputs 600 pulse signals per rotation and the sampling time of the rotation speed calculator 3 is 100 msec. Speed N is {6
00 pulse / 100 msec} × {1000 msec /
600 pulses} × 60 sec = 600 rev / min. This detected rotation speed N (rev / min) is supplied to the converter 8, and the converter 8 detects the detected material speed V (m / min).
In order to derive, the converter 8 calculates V = π · D · N.
Here, π is the circumference ratio, and D is the diameter of the rewinding roll 7 at the time when the rotation speed is detected. The detected material velocity thus derived is output to the subtractor 9. Then, the subtractor 9 derives a velocity deviation value between the set material velocity received from the material velocity setting device 1 and the detected material velocity received from the converter 8 and outputs it to the material velocity correction calculator 10. Then, the material speed correction calculator 10 outputs a RAMP-shaped (inclined) signal with the speed deviation value from the subtractor 9 as a target value. Then, the adder 11 adds the output signal from the material speed correction calculator 10 to the set material speed signal from the material speed setter 1 to correct the set material speed, and the correction corresponding to the corrected set material speed. The signal is output to the converter 4. Then, the converter 4 derives a reference rotation speed for speed control of the reel drive motor 6 from the value of the corrected set material speed from the adder 11 and outputs it to the rotation speed control unit 5. The rotation speed control unit 5 performs feedback control so that the actual rotation speed of the reel drive motor 6 becomes the reference rotation speed. That is, according to the first embodiment, the reference rotational speed of the reel drive motor 6 is automatically corrected in real time using the speed deviation value between the material speed set value and the material speed detection value. Even in the unstable speed control region at the time of slowing up in the initial stage of the rotation start of the reel drive motor 6, the rotation speed of the reel drive motor 6 is stably controlled without fine adjustment of the material speed setting device 1 by the operator, thus saving the labor. Is possible.

Example 2. (Corresponding to Claim 2) FIG. 2 is a configuration diagram showing a rewinding roll speed control device according to a second embodiment of the present invention. As shown in the figure, the first embodiment is characterized in that a startup correction calculator 12 is added. The start-up correction calculator 12 receives the detected material speed output from the converter 8 and the paper feed start command 13 as a rewinding work start command operated by the operator, and outputs the processing result to the adder 11. . That is, the start-up correction calculator 12 sends to the adder 11 a bias signal for increasing the value of the set material speed from the input of the paper feed start command 13 until the rotation of the reel drive motor 6 reaches the specified speed. Output. This accelerates the unwinding of the rewinding roll having a large inertia. As a result, the alignment speed at the time of startup with the driving rolls for other threading is improved and the material is prevented from being stretched or loosened more than necessary, which makes the threading smooth and reduces the work time. Can be shortened.

Embodiment 3. (Corresponding to Claim 3) FIG. 3 is a block diagram showing a rewinding roll speed control device according to a third embodiment of the present invention. As shown in the figure, a feature is that a sampling time setting unit 15 is added to the first embodiment. The sampling time setting device 15 receives a paper passing signal 14 output from a line controller (not shown) as a signal indicating that the rewinding operation is in progress, and based on the paper passing signal 14, the reel drive in the rotation speed calculator 3 is driven. The sampling time of the rotation speed of the electric motor 6 is set according to the paper passing mode. With the above-mentioned paper passing, after the paper passing start signal by the operation of the operator is input to the line controller,
The state before the line stop signal is input to the line controller by the operation of the operator. During this state, the line controller outputs the paper passing signal 14. Therefore, according to the third embodiment, it is possible to set the sampling time that matches the actual sheet passing speed based on the sheet passing mode. Therefore, the sheet passing speed in the sheet passing mode (10 to 15 m
When it is necessary to measure a low material speed (e.g., about pm) and a high operating speed (2000 to 2500) in the operation mode.
mpm), it is necessary to automatically set the sampling time of the rotation speed calculator 3 for a long time in the above paper passing mode, and in the above operation mode, the rotation speed is measured. The sampling time of the arithmetic unit 3 is automatically set to a normal short time (several msec), and the measurement accuracy of the actual rotation speed of the reel drive motor 6 is improved (proportionally improved with respect to the sampling time ratio). . As a result, the accuracy of the rotation speed control of the reel drive motor 6 is improved, the plate passing speed of the rewinding roll 7 is stabilized, the plate passing operation becomes smooth, and the working time can be shortened.

[0017]

As described above, according to the first invention, the reference rotation speed of the reel drive motor is automatically corrected according to the speed deviation value between the set material speed value and the detected material speed value. Therefore, even in the unstable speed control region in the initial stage of the rewinding operation, the rotation speed of the reel drive motor 6 can be stably controlled without inviting the operator to finely adjust the material speed setting, and labor can be saved. effective.

According to the second aspect of the present invention, the correction is performed such that the value of the set material speed is increased until the rotation of the reel drive motor reaches a predetermined speed. There is an effect that the delivery can be automatically speeded up in real time, the uniform speed at the time of starting with another rewinding reel drive motor can be improved, and the work time can be shortened.

According to the third aspect of the invention, since the sampling time suitable for the actual rewinding speed is automatically set in real time, the accuracy of the rotation speed control of the reel drive motor can be improved and the working time can be reduced. There is an effect that it can be shortened.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a rewinding roll speed control device according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing a rewinding roll speed control device according to a second embodiment of the present invention.

FIG. 3 is a configuration diagram showing a rewinding roll speed control device according to a third embodiment of the present invention.

FIG. 4 is a configuration diagram showing a conventional rewinding roll speed control device.

[Explanation of symbols]

 4 Converter 5 Rotational speed control unit 6 Reel drive motor 7 Rewinding roll 8 Converter 9 Subtractor 10 Material speed correction calculator 11 Adder 12 Start correction calculator 13 Paper feed start command 14 Paper feed signal 15 Sampling time setting vessel

Claims (3)

[Claims] 1. An actual rotation speed of a reel driving electric motor for rewinding and driving a rewinding roll as a material is detected, and the detected rotation speed is a set material speed set as a rewinding work speed of a desired rewinding roll. In a rewinding roll speed control device equipped with a rotation speed control unit for feedback control so that the original reference rotation speed is obtained, a converter for converting the detected rotation speed into a detection material speed, and a detection material output from this converter A subtractor that derives the difference between the speed and the set material speed, a material speed correction calculator that derives the set material speed correction value according to the output from this subtractor, and an output from this material speed correction calculator An adder that adds the corrected value to the set material speed, and a correction that is the basis of the reference rotation speed of the reel drive motor according to the output from the adder. Roll speed controller rewind characterized by comprising a transducer to derive a constant material speed and outputs it to the speed control unit. 2. A set material speed during a period from when the detected material speed and the rewinding operation start command are received and the rewinding operation start command is input until the rotation of the reel drive motor reaches a predetermined speed. 2. The rewinding roll speed control device according to claim 1, further comprising a start-up correction calculator that outputs a bias signal for increasing the value of [1] to the adder. 3. The rewinding roll speed control device according to claim 1, further comprising a sampling time setting device that sets a sampling time of the detected rotation speed of the reel drive motor based on a rewinding mode.